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OOOOb COMPLIANCE GUIDE
ENCLOSED COMBUSTORS & FLARES

A plain-language summary of EPA NSPS OOOOb requirements for enclosed combustors and flares, and the dates that matter. General information only, not legal advice. Confirm your obligations with your environmental team.

KEY REQUIREMENTS AND DATES

  • Control devices must reduce methane and VOC by 95% or more

  • ECDs not on EPA's manufacturer-tested list need an initial performance test

  • TOC performance testing under 60.5413b(b): due January 22, 2027

  • Pilot flame and alarm requirements: January 22, 2027

  • Visible emissions observations: not extended, still in effect

  • NHV sampling narrowed by the April 2026 rule; a 14-day demonstration is allowed where it applies

  • A Phase 2 reconsideration is pending; we'll post updates on our blog

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Enclosed combustors, VCUs, complete ECD packages and OOOOb stack emissions testing. Engineered and built in the USA.

Steve Hogue  |  720.862.6862

Steve@CrimsonEnergyLLC.com

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HQ: Loveland, Colorado

Offices: Midland, TX  ·  McKinney, TX  ·  Gulf Shores, AL

Cartagena & Cali, Colombia

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